Number of Roots of Cubic Function ax^3 + bx^2 + cx + 1 IIT JEE GATE

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Let f(x) = ax3 + bx2 + cx + 1 have extrema at x = p, and q such that, p less than q, pq less than 0 and f(p)f(q) less than 0. Then the equation f(x) = 0 has
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SIR PLEASE UPLOAD A VIDEO FOR LINES AND ANGLES.

SanjaySingh-jmju
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Could p and q not have been 2 local maximas? or 2 local minimas? please reply, sir.

congee
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Sir, how to draw the graph from the equation if the equation has all unknown values?
Refer 2nd video f (x)=ax^3+bx^2 + cx+1 or also can refer 3rd video

mayurikhale